Pencil sharpener



| R. BAGGETT 2,470,387

PENCIL SHARPENER May 17, 1949.

Filed Nov. 22, 1946 Patented May 17, 1949 UNITED STATES PATENT FFICE 2 Claims. l

This invention relates to improvements in pencil Sharpeners.

An object of the invention is to provide a pencil Sharpener which includes a housing for the reception of a pencil to be sharpened, and having a plurality of knife rollers rotatable therein to sharpen the pencil.

Another object of the invention is to provide a pencil Sharpener including a. housing for the reception of a pencil to be sharpened, with a plurality of inclined knife edged spiral rollers inclined to the axis of the pencil in order to sharpen the pencil, means being provided rotating the spiral rollers.

A further object of the invention is to provide a pencil Sharpener which is simple in design, inexpensive to manufacture, relatively small in size, and which is effective in operation.

Other objects and advantages of the invention will become apparent from the following description of a preferred embodiment thereof as illustrated in the accompanying drawings, and in which,

Figure 1 is an elevational view of my improved pencil Sharpener,

Figure 2 is a partly sectional view of the pencil sharpener shown in Figure l,

Figure 3 is a face view of a washer bearing employed in the device,

Figure 4 is a sectional View taken on line 4--4 of Figure 2, and,

Figure 5 is a sectional view of the pencil sharp ener showing the pencil disposed therein.

Reference may now be had to the drawings, in which like reference characters denote similar parts throughout the several views. As shown, there is a tubular ferrule I0 having an axial bore I2 extending therethrough for the reception of a pencil I4 to be sharpened. The forward end portion I6 of the ferrule I0 is frusto-conical as shown best in Figures 2 and 5, with teeth I8 formed upon its forwardly convergent surface.

A bearing washer '20 has an axial aperture 22 for the reception of the pencil I4, and is also provided with bearing apertures 24 for the reception of the reduced shank portions 26 of the spirally formed knife-rollers 28 the axes of which are inclined toward the axis of the pencil I4 and of the ierrule I8, so that the right hand ends 30 of the rollers converge as shown. Secured to the left hand ends of the rollers 28 are toothed gear wheels 32 which are adapted to intermesh with the teeth I8 of the ferrule.

The right hand ends 30 of the cutting rollers 28 have reduced pointed extensions 34 which are adapted to be rotatably received in bearing apertures 36 formed in the two halves 38 and 40 of a yright hand bearing Washer 42, the `right hand bearing washer being considerably smaller than the left hand Washer 20. The apertures 36 are open along their intersection with the inside perimeter of the washer 42, which is cut away for that purpose.

An outer irusto-conical casing 44 has its left hand end 46 internally threaded to receive the threads 48 formed on the ferrule I 0 as shown best in Figures 2 and 5, the casing 44 being adapted to overlie or contain the bearing washers 2l) and 42, thus also containing the cutting rollers 28 which are hence rotatable inside the relativeliT stationary casing 44. The right hand end 50 of the outer casing 44 is bifurcated as shown and pinned or riveted at 52 over a right hand end tubular housing 54.

The pointed ends 34 of the cutter rollers 28 extend into appropriately formed recesses in a cylindrical member 56 the right hand end 58 of which, as seen in Figure 2, is pinned at 60 between the bifurcated ends 62 of a connecting spinning member 64 extending into the right hand housing 54 and rotatable axially therein upon rotation of the knurled end 66 thereof.

To operate the device, a pencil I4 is inserted into the ferrule I0 with its forward end bearing into the cutting chamber defined by the cutting rollers 28. The pencil, ferrule I0, outer casing 44, and right hand housing 54 remain relatively stationary, while, under the inuence of the spinning member 64 the cylindrical member 56 rotates rapidly, carrying with it the two bearing washers 20 and 4i] together with the cutting rollers 28. The rollers 28 also spin about their axes due to the engagement of their gear wheels 32 with the relatively stationary gear teeth I6, thus sharpening the pencil.

Although I have described a preferred embodiment of my invention in specic terms, it is to be understood that various changes may be made in size, shape, materials and arrangement without departing from the spirit and scope of the invention as claimed.

Iclaim:

l. A pencil Sharpener comprising a ferrule for the reception of a pencil shank in line with the normal central axis of the ferrule, an outer casing threaded onto said ferrule and dening a pencil cutting chamber, a right hand end hollow tubular housing secured to the right hand end of the outer casing, the forward end of said ferrule extending into said pencil cutting chamber and having gear teeth formed thereon, a left hand end bearing washer in said casing, a right hand end bearing washer in said casing, a plurality of mutually inclined cutting rollers journaled at their ends in said washers and having gear teeth at one end for engagement with the teeth on said ferrule, and means extending through said right hand end housing for spinning said rollers about the central axis of said ierrule whereby the rollers are spun about their individual axes to sharpen a pencil therebetween.

2. A pencil Sharpener comprising a ferrule for receiving a pencil shank in line With the normal central axis of the ferrule, an outer casing secured upon the ferrule and deiining a pencilcutting chamber, a hollow tubular end housing secured to one end of the outer casing and forming a continuation thereof at said one end, the forward end of said ferrule projecting into the other end of said outer casing into the pencilcutting chamber therein and having integral gear teeth thereon, an end bearing Washer within the one end of said outer casing disposed adjacent to the forward projecting end of said ferrule, a second end bearing Washer within the other end of said outer casing, a plurality of mutuallyinclined cutting rollers journaled at the ends thereof in said end bearing washers and having gear teeth at one end for engaging the gear teeth on said ferrule, and means extending through said tubular end housing for spinning the cutting rollers about the central axis of said ferrule in order to spin said cutting rollers about their individual axes to sharpen a pencil projecting therebetween.

LEE ROY BAGGETT.

REFERENCES CITED The following references are of record in the iile of this patent:

UNITED STATES PATENTS Number Name Date 1,206,460 Myers Nov. 28, 1916 1,283,584 Spengler Nov. 5, 1918 

